Legrand WT-2250 Operating instructions

Brand: Legrand

Model: WT-2250

Type: Operating instructions

Wattstopper

Ultrasonic Occupancy Sensors

Installation Instructions • Instructions d’Installation • Instrucciones de Instalación

No: 24221 – 1/17 rev. 1

Catalog Numbers • Les Numéros de Catalogue • Números de Catálogo: WT-605, WT-1105, WT-2205, WT-2255

Country of Origin: Made in China • Pays d’origine: Fabriqué en Chine • País de origen: Hecho en China

SPECIFICATIONS

Voltage ......................................................................24VDC

Current Consumption:

WT-605 ............................................................... 27mA Max.*

WT-1105, 2205 & 2255 .......................................30mA Max.*

Maximum Output Current ........................................... 100mA

Ultrasonic Frequency .................................................. 32kHz

Time Delay Adjustment ....................15 seconds-30 minutes

Sensitivity Adjustment ........................ Trimpot (min. to max.)

*Current consumption can be slightly higher when only one

sensor per power pack is used.

UNIT DESCRIPTION

The WT-series Wattstopper ultrasonic occupancy sensors operate on 24VDC and automati cally turn lighting systems on and off

based on occupancy. The sensors use Doppler technology to sense occupancy. They broadcast high frequency sound waves into the

controlled area. Movement in the area will cause the sound waves to return to the sensor at a faster or slower rate resulting in a doppler

shift and occupancy detection. When the ultrasonic sensor detects occupancy, it switches lighting on through a Wattstopper Power or

Auxiliary Power Pack.

UNIT PLACEMENT

Placement of ultrasonic sensors is critical for proper operation. It is best

to place the sensor so that it has a clear view of all desktops and work

surfaces within the coverage area. Orientation of the sensor is also

important. The WT-605 offers 360° one-sided coverage while the WT-

1105, WT-2205, and WT-2255 provide 360° two-sided coverage.

Transducers (the two or four small round openings on the cover of the

sensor) operate in pairs (see the Coverage Patterns graphic), and the

centerline of the pair must be oriented correctly for proper coverage.

You should take the following into account when mounting sensors:

• The transducer pairs orientation determines the coverage pattern.

• Sensors should not be mounted so that transducers point

toward a wall that is within 4 feet of the sensor.

• Ultrasonic sensors may false trigger when exposed to high

volumes of air flow. Sensors should be installed at least 4 feet

from supply ducts and a minimum of 6 feet from horizontal

discharge ducts.

• Do not mount sensors within 6 inches of a power pack.

• Always mount the sensor on a rigid vibration free surface.

• When mounting multiple sensors in a large room, do not mount

the sensors within 10 feet of each other.

• Mounting above 12 ft. or in areas of open ceiling heights of

more than 12 ft will reduce overall coverage.

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Coverage Patterns

OPEN OFFICE SENSOR PLACEMENT

A typical layout for an open office space is to place the ultrasonic

sensors so they control the office area in zones that overlap. A 20%

coverage overlap is recommended.

Acoustic Tile Mounting

Install the Threaded Insert, flange side, into the hole on the back of

the sensor and turn clockwise until it locks.

7/8" (22mm)

hole

Ceiling Tile

Nut

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Threaded

Insert

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Keyhole Mounting

Positioning of keyhole mounting screws is important so that the

transducer pairs point in the desired direction.

1. Use the template below to mark the location of mounting

screws.

2. Install the provided screws—leaving approximately 3mm (1/8”)

space from the bottom of the screw head to the ceiling (see

diagram).

3. Place the sensor’s mounting keyholes over screw heads and

rotate sensor clockwise until secured.

Rotate

clockwise

Ceiling

Space:

3mm/(1/8")

Screws: 103mm

(4.1") apart

INSTALLATION

NOTE: Always try to attach the sensor to a vibration free surface.

ENCLOSED OFFICE SENSOR PLACEMENT

For smaller enclosed spaces, a WT-605 is recommended. Sensors should be placed so that they

will not detect motion through an open door.

Transducers must face into the room and not be directed toward the closest walls or doors.

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WIRING DIRECTIONS

Sensor Wiring:

• BLUE wire from power pack to BLUE wire from sensor.

• RED wire from power pack to RED wire from sensor.

• BLACK wire from power pack to BLACK wire from sensor.

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WARNING

TURN POWER OFF AT THE CIRCUIT

BREAKER BEFORE WORKING

WITH OR NEAR HIGH VOLTAGE.

SENSOR ADJUSTMENT

The Sensors are factory preset to allow for quick installation in most applications. However, verification of proper wiring,

coverage, sensitivity, and time delay adjustments can be made through the following steps.

Sensitivity and Time Delay adjustments are both made under the sensor’s front cover. Insert a small flat-blade screwdriver in the slot of

the front cover to open it.

The Sensitivity Adjustment Trimpot (labeled “S”) increases or decreases the occupancy detection sensitivity.

The Time Delay is the length of time the lights stay on after no motion has been detected. It is set with DIP Switches #1–5.

The red LED flashes each time the unit senses motion. It remains on when the sensor is in Override mode.

Override: setting DIP switch #6 to “ON” will bypass (override) all the sensor’s occupancy control functions. Lights can still be manually

on/off controlled with a light switch.

Output Disable: setting all DIP switches to “OFF” will disable the Control Output (see

Wiring Directions). This can be used for troubleshooting sensor and power pack problems.

Adjustment:

• Furnishings, carpeting or office structures

can affect ultrasonic sensitivity and

should be installed before adjustment, if

possible.

• Ultrasonic sensors should have their

sensitivity adjusted when interference

from air movement is at its maximum.

Override the the HVAC and VAV systems

to the maximum “ON” position.

1. Set the Sensitivity adjustment trimpot to

about mid-range.

2. Set the Time Delay to 15 seconds for

this testing procedure.

3. Move out of the controlled area.

The lights will turn off in about 15

seconds from the last flash of the

red LED. If the LED continues to

flash, the sensor is detecting some

kind of movement. Turn the Sensitivity

adjustment trimpot down slightly

(counterclockwise) and repeat this step until the LED does not flash and the lights turn off.

4. Now walk into the controlled area. If the lights don’t turn on, increase the Sensitivity slightly (clockwise) and try again. Repeat this

procedure until the lights come on when entering the controlled area.

5. Also, if the lights turn off while the room is occupied, it may be necessary to increase the Sensitivity slightly.

6. Set the desired Time Delay—16 minutes works well for normal applications.

Factory Presets: Sensitivity = 50% / Time Delay = 16 minutes.

TROUBLESHOOTING

• Check that wiring connections are correct and secure.

• Make sure that the line voltage is +/- 10% of rating.

Lights do not turn off after the time delay elapses, and...:

... the red LED does not ash (does not sense motion)—possible sensor or power pack problem:

Set DIP switches to Output Disable, or disconnect the blue wire to the sensor.

• If lights go out—possible sensor problem (Call Tech Support).

• If lights do not go out—check wiring, if OK—possible power pack problem (Call Tech Support).

... the red LED ashes (senses motion):

Set DIP switches to Output Disable, or disconnect the blue wire to the sensor.

• If the lights do not go out—check the wiring.

• If lights still do not go off, check the distance between the power pack and sensor. Watstopper recommends a distance of at least 5

feet

• If the lights go out—reset the DIP switch to previous settings, or reconnect the blue wire. Note the sensitivity and time delay

settings, then lower the sensitivity and time delay adjustment to minimum.

▸ If the lights go out after the set time delay period—the sensor may have been adjusted too high, so that vibration, air movement

or other minor motion was activating it. Adjust the sensitivity down from its previous setting to a level needed for normal

operation, and reset the time delay.

▸ If the lights still do not go out—possible sensor problem (Call Tech Support).

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DIP Switch Settings

Sensitivity Adjustment Trimpot

(factory preset to 50%)

DIP Switch

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LED Indicator

800.879.8585

www.legrand.us/wattstopper

No. 24221 – 1/17 rev. 1

Wattstopper warranties its products to be free

of defects in materials and workmanship for a

period of five (5) years. There are no obligations

or liabilities on the part of Wattstopper for

consequential damages arising out of, or in

connection with, the use or performance of this

product or other indirect damages with respect

to loss of property, revenue or profit, or cost of

removal, installation or reinstallation.

Wattstopper garantit que ses produits sont

exempts de défauts de matériaux et de fabrication

pour une période de cinq (5) ans. Wattstopper

ne peut être tenu responsable de tout dommage

consécutif causé par ou lié à l’utilisation ou

à la performance de ce produit ou tout autre

dommage indirect lié à la perte de propriété, de

revenus, ou de profits, ou aux coûts d’enlèvement,

d’installation ou de réinstallation.

Wattstopper garantiza que sus productos

están libres de defectos en materiales y mano

de obra por un período de cinco (5) años. No

existen obligaciones ni responsabilidades por

parte de Wattstopper por daños consecuentes

que se deriven o estén relacionados con el

uso o el rendimiento de este producto u otros

daños indirectos con respecto a la pérdida

de propiedad, renta o ganancias, o al costo

de extracción, instalación o reinstalación.

WARRANTY INFORMATION INFORMATIONS RELATIVES À LA GARANTIE INFORMACIÓN DE LA GARANTÍA

Lights do not turn on, even with motion in the room, and...:

... the red LED does not ash (does not sense motion):

• Make sure the circuit breaker has been turned back on.

• Check the sensitivity setting and increase as needed.

• Check that 24VDC is at the sensor red wire.

▸ If 24VDC is present—possible sensor problem (Call Tech Support).

▸ If 24VDC is not present at the sensor:

• Make sure that the power pack has the correct voltage rating for your voltage (120 or 277VAC). Replace with correctly rated

power pack.

• If the power pack is correct—check the high-voltage going into the power pack—use proper safety precautions.

• If 120 or 277VAC is present—possible power pack problem (Call Tech Support).

... the red LED ashes (senses motion):

• Turn the light switch ON, if off. The light switch needs to be on for automatic switching to occur.

• If the light switch is on, check for 24VDC at sensor blue wire.

▸ If present, check wiring connections, if OK—possible power pack problem (Call Tech Support).

▸ If 24VDC is not present—possible sensor problem (Call Tech Support).

Override:

Setting DIP switch #6 to on will bypass (override) all the sensor’s occupancy control functions. Lights can still be manually on/off

controlled with a light switch.

ORDERING INFORMATION

Catalog # Description

WT-605 360° one-sided, 32kHz Ultrasonic Occupancy Sensor, up to 600 sq ft coverage

WT-1105 360° two-sided, 32kHz Ultrasonic Occupancy Sensor, up to 1100 sq ft coverage

WT-2205 360° two-sided, 32kHz Ultrasonic Occupancy Sensor, up to 2200 sq ft coverage

WT-2255 360° two-sided, 32kHz Ultrasonic Occupancy Sensor, up to 80 linear ft coverage

BZ-50 Power Pack: 120/277VAC, 50/60Hz, 20A ballast or incandescent

BZ-150 Power Pack: 120/277VAC, 50/60Hz, 20A ballast or incandescent, with Hold-On and Hold-Off capability

BZ-200 Power Pack: 120/277VAC, 50/60 Hz, 20A Ballast/ELV/MLV/Incandescent/LED, 16A, E-Ballast/CFL/Plug Load

BZ-250 Power Pack: 120/277VAC, 50/60 Hz, 20A, Ballast/ELV/MLV/Incandescent/LED, 16A E-Ballast/CFL/Plug Load, with

Hold-On/Hold-Off capability

BZ-250-347 Power Pack: 120/347VAC, 50/60 Hz, 16A Ballast/ELV/MLV/Incandescent/LED/ E-Ballast/CFL, 15A Plug Load, with

Hold-On/Hold-Off capability

All sensors available in White.

Legrand WT-2250 Operating instructions

Legrand WT-2250 Operating instructions

Legrand WT-2250 Operating instructions

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